Combined bunsen burner, more particularly for gas water heaters



Nov. 29, 1966 G. HElN ETAL 3,288,195 COMBINED BUNSEN BURNER, MORE PARTICULARLY FOR GAS WATER HEATERS Filed Jan. 9, 1964 2 Sheets-Sheet 1 IN V EN TORS 0/ 9 116172 [rib/2 Papfl M W & \jeulkw Nov. 29, 1966 G. HEIN ETAL 3,288,196

COMBINED BUNSEN BURNER, MORE PARTICULARLY FOR GAS WATER HEATERS Filed Jan. 9, 1964 2 Sheets-Sheet 2 5 M p ELCF w I g 0 H 6/ W G5 \illm 9 W m n" n X r-u \m B nl h. I 5 MT. 4 "W N F m Vw United States Patent Ofifice 3,288,196 Patented Nov. 29, 1966 3,288,196 COMBINED BUNSEN BURNER, MORE PARTICU- LARLY FOR GAS WATER HEATERS Georg Hein, Huclreswagen, and Erich Tropp, Remscheid, Germany, assignors to Job. Vaiilant K.G., Remscheid, Germany Filed Jan. 9, 1964, Ser. No. 336,789 Claims priority, application Germany, Feb. 14, 1963, V 23,651; May 16, 1963, V 24,065; May 14, 1963,

11 Claims. (Cl. 158-115) The present invention relates to a combined Bunsen burner comprising several individual burners, more particularly for gas water heaters. The invention relates in particular to such a type of burner wherein each individual burner consists of two pressed sheet metal cups connected with each other and forming a horizontally arranged mixing chamber, and a lamellar burner insert closing off the mixing chamber to the top and provided with gas outlet openings. Such burners with horizontally arranged mixing chambers are marked by small overall height, as is well known, a fact which bears particular significance for gas water heaters. It is customary to have several individual burners of this type arranged adjacently associated with one gas outlet nozzle each of a common distributing pipe.

It is the object of the present invention to so provide such a combined Bunsen burner as to be manufactured easily, mounted conveniently and assembled in a spacesaving manner in a gas water heater between a gas section and a heating body. To this end according to the invention the distributing pipe is of T-shaped design and, projecting laterally, rigidly connected with a central connection piece which may be screwed to the gas supply line. It is expedient to have the connection piece provided with a shoulder serving for attaching a pilot burner on the side thereof turned away from the distributing pipe. Thereby, a stable supporting member is produced Whereat the individual burners may be mounted so as to be positioned in place.

It is particularly advantageous if the individual burners are combined to form a grating by connecting sheet metal bars secured to the ends of the individual burners which are arran ed in parallel and a spaced distance apart from each other, said grating being removably mounted as a unit on the distributing pipe on the one hand and on the shoulder of the connection piece on the other hand. Then, the individual burners constitute a uniform unit to be manufactured independently of the supporting member, which may easily be removed with few manipulations, for instance for cleaning the burner nozzles and the gas outlet openings and assembled again. It is expedient to have the nozzles designed as injector nozzles which are formed with lateral openings for the primary air supply and a cylindrical projection with a flaring bore, upon which the mouthpieces of the individual burners 9 may be attached and thereby centered.

In order to achieve a sufficient secondary air supply, each individual burner is formed with numerous gas outlet slots arranged parallel with respect to the distributing pipe. To ensure a quick ignition from one individual burner to the next one in the case of gas hard to ignite, it is expedient to have each individual burner at the same location formed with an enlargement with a gas outlet slot extending to the edge of the enlargement. Thereby, without particular expense an ignition bridge is provided facilitating the jumping over of the ignition.

As the connection piece provided with the pilot burner and bimetal safety device is arranged between two individual burners, a relatively great distance between these two individual burners occurs. It is therefore expedient to so adapt the pilot burner that three pilot flames result of which one each is directed obliquely to the neighboring individual burners and the third one to the bimetal of the pilot safety device. Thereby, a simultaneous ignition of the two individual burners adjacent the pilot burner is achieved from which a jumping-over of the ignition to further individual burners takes place in the manner described.

An embodiment of the invention and further inventive details are presented in FIGS. 1 to 4 and described as follows:

FIG. 1 is an elevational view of the supporting member comprising the connection piece and the distributing pipe;

FIG. 2 is an elevational view of the removable unit formed of individual burners;

FIGS. 3 and 4 show the elevational and plan view of the combined Bunsen burner;

FIGS. 5 and 6 show details of a modified embodied form.

To a connection piece 1 which is screwed to a central gas section housing (not shown) by means of a nut 2 of a union, is secured a laterally projecting T-shaped distributing pipe 3. The central arm 3' of distributing pipe 3 serves as connecting supply pipe and the cross arm 3" on both sides of the central arm 3' is formed with two spaced apart gas outlet nozzles 4. On the side opposite distributing pipe 3 the connection piece 1 is formed with a shoulder 5 carrying a pilot burner 6 and a bimetal spring 7. In, known manner the bimetal spring 7 controls a pilot safety valve (not shown) arranged internally of the connection piece 1 and operated by means of a push rod 7'. To the cross arm 3" a holding sheet 8 bent inwardly is secured on the side turned away from the nozzles 4. A unit comprised of individual burners, illustrated in FIG. 2, is connected with the described supporting member in a manner as will be described hereinafter. As can be seen in FIG. 4, the unit comprises four individual burners 9 arranged parallel to each other and a spaced distance apart, each being associated with one of the gas outlet nozzles 4. Each of the individual burners 9 consists of two pressed sheet metal cups 10, 10' which are in matching relation with an impressed V-shaped rib 11 and providing a mouthpiece 12 as well as a following V-shaped mixing chamber 13 extending substantially in horizontal direction. At the upper edge, each of the sheet metal cups 10, 10' is formed with a groove 14 impressed inwardly. The mixing chamber 13 is closed ofi at the top by a burner insert 15 formed with a plurality of burner slots 16 extending parallelly with respect to the cross arms 3 of the distributing pipe. The burner insert 15 has U-shaped cross-section and is arranged with the legs thereof between the upper edges of the sheet metal cups 10, 10' and is supported on the impressed grooves 14. The four individual burners 9 are connected with each other to form a grating-like unit by sheet metal bars 17, 18 on both sides thereof. The sheet metal bar 17 has the profile of a U lying on its side. The upper leg 17' thereof is formed with rectangular cutout portions 17" into which the individual burners 9 are inserted so that the sides of the cutout portions 17" enter into the impressed grooves 14. In the same manner the individual burners 9 are inserted into cutout portions 18. The outer side of the sheet metal bar 18 is bent downwardly for strengthening.

The rib 11 formed by the sheet cups 10, 10 is provided with a recess 11. Each individual burner 9 is provided in the center thereof with an enlargement 21 reducing the distance A on both sides. The burner insert 15 is formed with two gas outlet slots 16, 16" extending to the edge in the enlarged area 21 so that an ignition bridge is produced.

The two parts illustrated in FIG. 1 and FIG. 2 are connected so as to be separable. As is shown in FIG. 3 and FIG. 4, with each individual burner 9 the bent portion of the holding sheet 8 is provided with a recess 8' which engages the cutout portion 11' of the rib 11 so that when assembled each individual burner is positioned in place by the holding sheet 8 vertically as well as laterally. The sheet metal bar 17 fits about and grips shoulder 5 of the connection piece 1 and is connected therewith by a screw 19 at the front face thereof. The gas outlet nozzles 4 are adapted to form injector nozzles which are formed with lateral openings 4' for the admission of primary air and a cylindrical projection 4 with a flared out bore 20. The mouthpieces 12 of the individual burners are each slipped on a cylindrical projection 4" of the nozzles 4 so that an exact centering between nozzle 4 and mouthpiece 12 of the individual burner is effected. By unscrew-' ing the only screw 19, the parts may be separated and the individual burners 9 drawn out together in horizontal direction so that the gas outlet nozzles 4 as well as the burner slots 16 are conveniently accessible and may be cleaned.

The pilot burner 6 is so adapted that three pilot flames 22, 22', 22" are formed. The central pilot flame 22 is directed towards the bimetal spring 7 and controls the pilot safety valve, while the outer pilot flames 22', 22" are obliquely directed towards the adjacent individual burners 9. Thus, a simultaneous ignition of the individual burners 9 is efiected by the pilot flames 22', 22". Through the ignition bridge provided by the transverse slot 16', 16" a quick ignition is taking place from one individual burner to the next one. The longitudinal edge of the burner insert 15 may be intersected by the slots 16, 16" so that at these slots 16', 16" a flame is produced which is directed towards the neighboring individual burner.

With a further embodied form of the invention illustrated in FIGS. 5 and 6 simple gas nozzles 34 are screwed into the horizontal arms 3" of the distributing pipe 3. The horizontal arms 3" of the distributing pipe are provided with sleeve-shaped bosses 35 into which the gas outlet nozzles 34 are screwed. The mouthpiece 12 formed by the sheet metal cups 10, of the individual burners 9 has a projection 36 provided by two bent brackets 36', 36" of the sheet metal cups 10, 10'. These brackets 36', 36" have semicircular recesses 37 which fit halfway around the arms 3 of the distributing pipe 3 adjacent the boss 35. The projection 36 is open at the bottom side and thus permits the unimpeded entrance of primary air. By reason of the fit of the projection 36 in connection with the boss 35, each individual burner 9 is aligned at the distributing pipe arm 3" so that a concentric position of the gas outlet nozzles 34 with respect to the burner mouthpiece 12 is ensured.

What we claim is:

1. Combined Bunsen burner apparatus particularly for use with gas water heaters and adapted to be connected to a gas supply line, said apparatus being comprised of several individual burners, each individual burner including two pressed sheet metal cups connected with each other and forming a horizontally arranged mixing chamber, and a lamellar burner insert closing oif the mixing chamber at the top and provided with gas outlet openings, said individual burners being arranged adjacently and associated with one gas outlet nozzle each of a common distributing pipe, said distributing pipe being of T-shaped design and projecting laterally from and rigidly connected to a central connection piece which may be screwed to the gas supply line.

2. Combined Bunsen burner apparatus according to claim 1, characterized in that said connection piece on the side thereof opposite the distributing pipe is formed h a sho lder serving forv attaching a pilot burner.

3. Combined Bunsen burner apparatus according to claim 2, wherein said connection piece is arranged between two individual burners having a greater distance therebetween, characterized in that the pilot burner is so adapted that three pilot flames are resulting, of which one each is directed obliquely to the neighboring individual burners and the third one to the bimetal of a pilot safety device.

4. Combined Bunsen burner apparatus according to claim 1, characterized in that the individual burners are combined to form a grating parallelly with respect to each other and a space distance apart by connecting sheet metal bars secured to the ends of said individual burners, said grating being removably mounted as a unit on the distributing pipe on the one hand and on the shoulder of the connection piece on the other hand.

5. Combined Bunsen burner apparatus according to claim 4, characterized in that on the side of the distribution pipe opposite the nozzles is mounted an inwardly bent holding sheet, the bent portion of which is engaging in recesses of the individual burners.

6. Combined Bunsen burner apparatus according to claim 4, characterized in that one of the sheet metal bars connecting the individual burners has the profile of a U lying on its side into which the shoulder of the connection piece is fitted and connected with the sheet metal bar by a screw.

7. Combined Bunsen burner apparatus according to claim 4, characterized in that the sheet metal bars connecting the individual burners are formed with U-shaped cutout portions into which the individual burners provided with impressed grooves are inserted.

8. Combined Bunsen burner apparatus according to claim 1, characterized in that the individual burners are provided with a plurality of transversely extending gas outlet slots and are formed at the same location with an enlargement, and in the area of the enlargement the gas outlet slot extends to the edge of said enlargement.

9. Combined Bunsen burner apparatus according to claim 1, characterized in that the gas outlet nozzles fonn injector nozzles known as such and provided with primary air openings in a nozzle projection, and that the mouthpieces of the individual burners are slipped on the nozzle projection.

10. Combined Bunsen burner apparatus according to claim 1, characterized in that simple gas outlet nozzles are screwed in one boss each of the distributing pipe arm, and that a projection open at the bottom side, projecting beyond the burner mouthpiece, is provided at the individual burners, said projection fitting about the boss of the distributing pipe arm.

11. Combined Bunsen burner apparatus according to claim 10, characterized in that the projection is formed of bent brackets of the pressed sheet metal cups projecting beyond the burner mouthpiece, which are formed with a semicircular recess corresponding to the diameter of the distributing pipe arm.

References Cited by the Examiner UNITED STATES PATENTS 705,581 7/1902 Harper 158-106 1,093,499 4/1914 Tobias 158-106 1,878,552 9/1932 Tinnerman 158-115 1,942,397 1/1934 Cuyler 158-115 X 1,972,016 8/1934 Horton 158-105 1,974,222 10/1934 Teller et al.

2,065,719 12/1936 Morgan 126-39 2,094,284 10/1937 Le Pas.

2,286,610 6/1942 Focke et al 158-115 3,184,337 5/1965 Craemer.

FREDERICK L. MAITESON, JR., Primary Examiner. 

1. CONDINED BUNSEN BURNER APPARATUS PARTICULARLY FOR USE WITH GAS WATER HEATERS AND ADAPTED TO BE CONNECTED TO A GAS SUPPLY LINE, SAID APPARATUS COMPRISED OF SEVERAL INDIVIDUAL BURNERS, EACH INDIVIDUAL BURNER INCLUDING TWO PRESSED SHEET METAL CUPS CONNECTED WITH EACH OTHER AND FORMING A HORIZONTALLY ARRANGED MIXING CHAMBER, AND A LAMELLAR BURNER INSERT CLOSING OFF THE MIXING CHAMBER AT THE TOP AND PROVIDED WITH GAS OUTLET OPENINGS, SAID INDIVIDUAL BURNERS BEING ARRANGED ADJACENTLY AND ASSOCIATED WITH ONE GAS OUTLET NOZZLE EACH OF A COMMON DISTRIBUTING PIPE, SAID DISTRIBUTING PIPE BEING OF T-SHAPED DESIGN AND PROJECTING LATERALLY FROM AND RIGIDLY CONNECTED TO A CENTRAL CONNECTION PIECE WHICH MAY BE SCREWED TO THE GAS SUPPLY LINE. 